Maleic anhydride (MA CAS 108-31-6) is referred to as maleic anhydride, also known as 2,5-furandione, maleic anhydride, anhydrous malic anhydride, and is the third largest acid anhydride in the world after phthalic anhydride and acetic anhydride. , It is a colorless needle-like crystal at room temperature, with a pungent odor and sour taste, melting point 52.8 ℃, boiling point 202℃, easy to sublime and flammable, sublimation, easily soluble in water, and generate maleic acid (maleic acid), also It is soluble in benzene, acetone, ethanol and other organic solvents, and is a commonly used important organic chemical raw material. Wide range of downstream applications, including unsaturated polyester resin (UPR), paints, coatings, curing agents, organic acids, dyes, water treatment agents, lubricant additives, rosin and other dozens of industries.
The use of maleic anhydride is mentioned in the following aspects:
1. It is used as raw material for the production of 1,4-butanediol, γ-butyrolactone, tetrahydrofuran, succinic acid, unsaturated polyester resin, alkyd resin, etc. It is also used in medicine and pesticides.
2. It acts as a collector in metal beneficiation.
3. It is used in organic synthesis and also used as intermediate of synthetic fiber.
4. The use of maleic anhydride In the production of pesticides, it is used to synthesize diethyl maleate, an intermediate of the organophosphorus insecticide malathion, and an intermediate of 1-phenyl-3,6-pyridazinthion. Dihydroxypyridazine, as well as the intermediates of pyrethroid insecticide pyrethroid, fungicides, captandan, in addition, it is also used in the production of unsaturated polyester resins, ink additives, papermaking additives, coatings and pharmaceutical industries , food industry, etc.
5. It is used as raw material for the production of unsaturated polyester resin, alkyd resin, pesticide malathion, high-efficiency and low-toxic pesticide 4049, and long-acting iodine amine. It is also a coating, male rosin, polymaleic anhydride, maleic anhydride-styrene copolymer.
Use of Maleic Anhydride in Food and Beverage Industry
Another common use of maleic anhydride is in food and beverages. Maleic anhydride is approved by the Food and Drug Administration (FDA) as a “direct” food additive. Specifically, in the present application, maleic anhydride can be converted back to maleic acid and/or fumaric acid, which can be used to produce food additives. Food additives containing maleic anhydride can be used as preservatives, to control pH, or to enhance the flavor of foods and beverages. It imparts a puckered, tart flavor to foods and is often added to pudding mixes and powdered beverages to enhance flavor.
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